 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.update.internal.ui.views;

 import java.lang.reflect.InvocationTargetException ;

 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.jface.dialogs.ErrorDialog;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.update.internal.operations.UpdateUtils;
 import org.eclipse.update.internal.ui.UpdateUI;
 import org.eclipse.update.internal.ui.UpdateUIMessages;
 import org.eclipse.update.internal.ui.model.ConfiguredFeatureAdapter;
 import org.eclipse.update.operations.IOperation;
 import org.eclipse.update.operations.OperationsManager;

 public class FeatureStateAction extends FeatureAction {

     private ConfiguredFeatureAdapter adapter;

     public FeatureStateAction(Shell shell, String text) {
         super(shell, text);
         setWindowTitle(UpdateUIMessages.FeatureStateAction_dialogTitle);
     }
     
     public void setSelection(IStructuredSelection selection) {
         
         this.adapter = (ConfiguredFeatureAdapter) selection.getFirstElement();
         if (adapter.isConfigured()) {
             setText(UpdateUIMessages.FeatureStateAction_disable);
         } else {
             setText(UpdateUIMessages.FeatureStateAction_enable);
         }
     }

     public void run() {
         try {
             if (adapter == null)
                 return;
             
             IStatus status = OperationsManager.getValidator().validatePlatformConfigValid();
             if (status != null)
                 throw new CoreException(status);
             
             boolean isConfigured = adapter.isConfigured();
             // Ask user to confirm the operation
 String message =
                 isConfigured
                     ? UpdateUIMessages.FeatureStateAction_disableQuestion
                     : UpdateUIMessages.FeatureStateAction_EnableQuestion;

             if (!confirm(message))
                 return;

             // If current config is broken, confirm with the user to continue
 if (OperationsManager.getValidator().validateCurrentState() != null &&
                     !confirm(UpdateUIMessages.Actions_brokenConfigQuestion))
                 return;
             
             IOperation toggleOperation =
                 isConfigured
                     ? (IOperation)OperationsManager
                         .getOperationFactory()
                         .createUnconfigOperation(
                         adapter.getConfiguredSite(),
                         adapter.getFeature(null))
                     : OperationsManager
                         .getOperationFactory()
                         .createConfigOperation(
                         adapter.getConfiguredSite(),
                         adapter.getFeature(null));

             boolean restartNeeded = toggleOperation.execute(null, null);
             UpdateUI.requestRestart(restartNeeded);

         } catch (CoreException e) {
             ErrorDialog.openError(shell,
                     null, null, e.getStatus());
         } catch (InvocationTargetException e) {
             // This should not happen
 UpdateUtils.logException(e.getTargetException());
         }
     }
     
     public boolean canExecuteAction() {
         return true;
     }

 }

